Perhitungan Kebutuhan Zinc Anode Dan Kebutuhan Cat [PDF]

Citation preview

Perhitungan Kebutuhan Zinc Anode dan Kebutuhan Cat Ship Particular Nama kapal



: MT. Trust Honor



Klasfikasi



: BKI



Bendera



: Indonesia



GRT



: 4565 Ton



LOA



: 107,78 M



LBP



: 100 M



Breadth



: 17,6 M



Depth



: 8,6 M



Draft



: 7,078 M



Cb



: 0.8



Luas Bidang Basah S



=



(1,7 . d . + Cb . B) L



(Nautical Calculation Explained By J Klinkert & G W White) Dimana : S



= Luas bidang basah (m²)



D



= Draft (m)



Cb



= Koefisien Blok (m)



B



= Lebar (m)



Lbp



= Length between perpendiculars (m) , jadi



S



= (1,7 . 7,078 + 0,8 . 12,5) 100



S



= 2611 m²



Perhitungan Kebutuhan Zinc Anode 𝑚𝐺 =



𝐴𝐺 ∗𝐽𝑠 ∗𝑡𝑠 𝑄𝑔



(kg)



[ Rules BKI Vol II Sec 38 F.3.2.3 ]



Dimana : mG



= Berat total anoda (kg)



AG



= Luas total permukaan yang dilindungi (m²)



= 2611 m² Js



= Persyaratan arus pelindung (A/m²) = 0.02 A/m² [ Rules BKI Vol II Sec 38 F.3.2.2 ]



ts



= Periode perlindungan (jam) = 12 bulan = 8760 jam = 24 bulan = 17520 jam = 36 bulan = 26280 jam



Qg



= Efisiensi elektrokimia dari baha anoda (Ah/kg) = 780 Ah/kg [ Rules BKI Vol II Sec 38 F.3.2.1)



Kebutuhan Zinc Anode periode 36 bulan mG



= 2611 x 0.02 x 26280 780



mG



= 586,53 kg



Spesifikasi Zn (a) = 10 kg/pcs N min = mG /a N min = 59 pcs Perhitungan Kebutuhan Cat - Luas bidang basah : 2611 m² - Luas top side : St = [ (H-d) x (Loa + 0.5 B) x 1.5] x 2 Dimana : St



= Luas topside m²



H



= Tinggi (m)



d



= Draft (m)



Loa = Panjang (m) B



= Lebar (m)



St



= [(8,6 – 7,078) x ( 107,78 + 0.5 . 17,6) x 1.5 ] x 2



St



= 368,26 m²



Asumsi brand yang dipakai hempel Kebutuhan Cat untuk Area di bawah Garis Air a) Layer 1 Hempadur Quarto 17634 (Red) DFT 125 - Paint consumption DFT x Area 10 x % VS - Paint consumption 150 x 532,3 540 - Paint consumption 147,86 liter - Bannoh thinner 7,4 liter b) Layer 2 Hempadur 47182 (Yellowiest) DFT 80 - Paint consumption DFT x Area 10 x % VS - Paint consumption 80 x 532,3 465 - Paint consumption 91,58 liter - Bannoh thinner liter 4,58 liter c) Layer 3 Hemples AF Olympic 72950 (Brown) DFT 100 - Paint consumption DFT x Area 10 x % VS - Paint consumption 100 x 532,3 472,5 - Paint consumption 472,5 liter - Ravax thinner liter 5,63 liter



Kebutuhan Cat untuk Area Top Side a) Layer 1 Hempadur Quarto 17634 (Red) DFT 125 - Paint consumption DFT x Area 10 x % VS - Paint consumption 150 x 368,3 504 - Paint consumption 109.6 liter - Bannoh thinner 5,5 liter



b) Layer 1 Hempadur Mastic 45881 (Black) DFT 100 - Paint consumption DFT x Area 10 x % VS - Paint consumption 100 x 368,3 560 - Paint consumption 65,76 liter - Bannoh thinner 3,3 liter